Sunday, January17, 2021
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Marine Weather and Tides
Topsham, ME

Version 3.4
NOTICE
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 7:07AMSunset 4:32PM Sunday January 17, 2021 1:00 AM EST (06:00 UTC) Moonrise 11:01AMMoonset 10:25PM Illumination 15% Phase: Waxing Crescent; Moon at 4 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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ANZ153 Casco Bay- 1036 Pm Est Sat Jan 16 2021
.small craft advisory in effect through late Sunday night...
Rest of tonight..SW winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 5 ft.
Sun..SW winds 20 to 25 kt, becoming W 15 to 20 kt in the afternoon. Gusts up to 35 kt. Seas 2 to 4 ft.
Sun night..W winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to 3 ft.
Mon..W winds 10 to 15 kt with gusts up to 25 kt. Seas around 2 ft.
Mon night..NW winds 10 to 15 kt with gusts up to 20 kt. Seas 1 to 2 ft in the evening, then 1 foot or less.
Tue..NW winds around 10 kt. Seas 1 foot or less.
Tue night..NW winds 5 to 10 kt. Seas 1 foot or less.
Wed..NW winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 1 foot or less, then 1 to 2 ft in the afternoon.
Wed night..NW winds 10 to 15 kt. Seas 1 to 2 ft in the evening, then 1 foot or less.
Thu..W winds 5 to 10 kt. Seas 1 foot or less, then 1 to 2 ft in the afternoon.
Thu night..W winds 5 to 10 kt. Seas 1 to 2 ft. A chance of snow showers after midnight.
ANZ100 1036 Pm Est Sat Jan 16 2021
Synopsis for stonington me to merrimack river ma out to 25 nm.. Winds will decrease for a brief time this evening as a band of southeast storm force winds track away and to the north of the region. Seas however will remain active with waves remaining around 10 ft at the least through tonight. An offshore gale returns late tonight through tomorrow... Certainly for the outer waters, likely for penobscot bay, and possibly for casco bay.


7 Day Forecast for Marine Location Near Topsham, ME
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location: 43.92, -69.96     debug


Area Discussion for - Gray/Portland, ME
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FXUS61 KGYX 170336 AFDGYX

Area Forecast Discussion National Weather Service Gray ME 1036 PM EST Sat Jan 16 2021

SYNOPSIS. Gusty winds and heavy precipitation ends for most areas this evening with snow showers continuing in the mountains. Low pressure will gradually exit through the Canadian Maritimes on Sunday. A weak system crosses the region on Monday with another system passing south of New England late Tuesday night and Wednesday. A ridge of high pressure will cross the region Thursday, followed by another system Friday into Saturday.

NEAR TERM /TONIGHT/. 1030PM UPDATE . Adjusted hourly precipitation chances based on latest thinking from radar trends. Still seeing areas of showers in the northern portion of the area, with a broader area of light snow moving in from the west as well. Still expect the remainder of the activity to primarily affect mountain locations where a few more inches are possible. Temperatures are still rather mild on the coastal plain and the combination of snow melt and rainfall has led to some fog mainly north of Lewiston/Augusta. Have included this in the forecast as well.

630PM UPDATE . Made some adjustments to the forecast mainly to drop the High Wind Warning and the winter headlines south of the mountains. Last of the precipitation is shifting to the northeast although another round of snow is possible up north as the low pulls away tonight, so the Winter Storm Warning will continue there.

ORIGINAL DISCUSSION . RAP analysis shows low pressure sitting squarely overhead of southwest Maine at this hour with rain and snow covering most of the state, extending pack into northern and central New Hampshire. Satellite shows the deep moisture plume, along with heavy rainfall threat, has now tracked east of the area with wrap-around deformation at the nose of a LLJ responsible for what falls over our area this evening. Dual-pol radar, surface observations, and spotter reports show the rain- snow line over the foothills at about 1000 ft of elevation. Strong wind gusts are now relegated to the Mid-Coast of Maine, where the LLJ still resides, so have kept the high wind warning running there . but have dropped wind headlines elsewhere.

Low pressure will continue to track north-northeastward toward the upper Saint John River Valley tonight with winds gradually turning to the southwest, then west, in its wake. Meanwhile the mid-level wave will continue to produce favorable forcing to continue snow over the mountains tonight . especially during the pre-dawn hours when the upper level dry slot shifts away and dendrite growth becomes favorable again. Thus a few more inches of snowfall is expected over the northern counties, especially at higher elevations where temperatures are more favorable. The Winter Storm Warning continues there through 7 AM Sunday to account for this.

SHORT TERM /SUNDAY THROUGH SUNDAY NIGHT/. Today's storm system will very slowly track north away from the area tomorrow as it becomes vertically stacked. It doesn't pull away very quickly however . as a result tomorrow will be a fairly brisk day with cooler temperatures mainly in the 30s over the area and a stiff west wind. While the mountains and north will have clouds most of the day, breaks in the clouds toward the south and coastal plain will allow temperatures to approach 40 which produces favorable mixing conditions to bring frequent gusts of 30 kts or more to the surface. Steep low-level lapse rates along with continued cyclonic flow aloft also produce a good environment for snow squalls . while moisture depth over the lowlands don't support widespread issues there could be a few periods over the mountains and perhaps the upper Connecticut River valley where travel will be very difficult in white-out snow and wind.

Low pressure pulls away into Labrador Sunday night which allows the PGF to slacken some, thus allowing winds to gradually relax overnight. Snow showers will decrease in coverage and intensity as well with lows down into the upper teens (north) to near 30 (coast).

LONG TERM /MONDAY THROUGH SATURDAY/. Models are in relatively good agreement bringing a short wave across the region Monday afternoon into Monday evening. A weak surface wave of low pressure may form with this feature allowing for a chance of snow showers in all portions of New Hampshire and western Maine. Temperatures will still be above normal for this time of the year, with readings in the 30s across southern and central areas. The warm boundary layer temperatures may allow for a few rain showers to mix in right along the coastline.

Another weak system will cross New England Tuesday night into Wednesday. This is a clipper type area of low pressure which will allow for another chance for precipitation across Maine and New Hampshire. It will be cooler with temperatures near or just below normal for this time of the year so any precipitation should remain in the form of snow showers.

The fast paced short waves will continue to race across the northern portion of the CONUS. Therefore, after a weak ridge passes the region Thursday, another system will bring a chance for a period of light snowfall or scattered snow showers to the region Friday and Saturday.

While 12Z guidance remains in relatively good agreement from model to model, timing issues with snow showers may be challenging throughout the week.

AVIATION /00Z SUNDAY THROUGH THURSDAY/. Short Term . Improvements to MVFR are already being seen over parts of southern New Hampshire and the Maine coast with further, gradual improvement to VFR through tonight. The exception is at KLEB and KHIE where -shrasn and eventually shsn will persist with restrictions overnight. These sites likely stay MVFR for CIGS tomorrow with occasional VIS restrictions in SHSN. Southeast winds are now decreasing and will gradually turn to the southwest, then west by tomorrow . becoming gusty to about 30 kts during the day.

Long Term . A few weak systems will be crossing the region this week, possibly bringing periods of light snow and MVFR conditions to the region. This will most likely be Monday, Tuesday night into Wednesday and again possibly Friday into Saturday.

MARINE. Short Term . Winds will decrease for a brief time this evening as southeast storm force winds track away and to the north of the region. Seas however will remain active with waves remaining around 10 ft at the least through tonight. An offshore gale returns late tonight through tomorrow . certainly for the outer waters, likely for Penobscot Bay, and possibly for Casco Bay.

Long Term . Winds and seas will likely reach SCA thresholds on Monday and Tuesday as a westerly gradient remains over the region.

GYX WATCHES/WARNINGS/ADVISORIES. ME . Winter Storm Warning until 7 AM EST Sunday for MEZ007>009. NH . Winter Storm Warning until 7 AM EST Sunday for NHZ001-002. MARINE . Small Craft Advisory until 1 AM EST Monday for ANZ153. Gale Warning from 1 AM Sunday to 1 AM EST Monday for ANZ150>152-154.



NEAR TERM UPDATE . Kimble SHORT TERM . Cannon LONG TERM . Casey


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CASM1 - 8418150 - Portland, ME 24 mi60 min 38°F 40°F
44007 - PORTLAND 12 NM Southeast of Portland,ME 29 mi40 min SW 19 G 25 40°F 42°F985 hPa35°F
44032 - Buoy E0104 - Central Maine Shelf 35 mi116 min SW 18 G 27 43°F 44°F14 ft985.6 hPa

Wind History for Wells, ME
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Wiscasset Airport, ME14 mi67 minSSW 610.00 miOvercast40°F37°F89%985 hPa
Auburn-Lewiston, ME20 mi64 minSSW 31.75 miUnknown Precip Fog/Mist36°F36°F100%985 hPa

Link to 5 minute data for KIWI

Wind History from IWI (wind in knots)
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Last 24hrCalm3CalmCalmE5E6E8
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E3S45S66SW6
1 day agoCalmCalmCalmCalm3CalmCalm34E4E5E6--4E3E4CalmE3CalmCalmCalmCalm33
2 days agoCalmCalmCalmCalmCalmCalmCalmCalmCalmSW3CalmSW3CalmCalm3CalmCalmCalmCalmCalmCalmCalmCalmCalm

Tide / Current Tables for Brunswick, Maine
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Brunswick
Click for Map
Sun -- 12:13 AM EST     -0.19 feet Low Tide
Sun -- 04:28 AM EST     3.78 feet High Tide
Sun -- 07:09 AM EST     Sunrise
Sun -- 10:00 AM EST     Moonrise
Sun -- 12:26 PM EST     0.25 feet Low Tide
Sun -- 04:30 PM EST     Sunset
Sun -- 04:37 PM EST     4.03 feet High Tide
Sun -- 09:25 PM EST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.20.11.32.83.73.73.532.31.610.50.30.41.42.83.843.83.32.61.81.10.5

Tide / Current Tables for Upper Hell Gate (Sasanoa River, Maine) Current
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Upper Hell Gate (Sasanoa River
Click for Map
Sun -- 02:40 AM EST     0.94 knots Max Flood
Sun -- 06:26 AM EST     -0.00 knots Slack
Sun -- 07:08 AM EST     Sunrise
Sun -- 08:22 AM EST     -0.74 knots Max Ebb
Sun -- 09:59 AM EST     Moonrise
Sun -- 11:52 AM EST     0.00 knots Slack
Sun -- 02:37 PM EST     0.91 knots Max Flood
Sun -- 04:30 PM EST     Sunset
Sun -- 06:33 PM EST     -0.00 knots Slack
Sun -- 08:45 PM EST     -0.93 knots Max Ebb
Sun -- 09:25 PM EST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.10.60.90.90.90.70.3-0.3-0.7-0.7-0.5-0.30.10.50.90.90.80.70.3-0.3-0.8-0.9-0.7-0.5

Weather Map
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wmap_A
GEOS Local Image of    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
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The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerous of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.